Oscar c



O. C. RIXSON.

LOCK.

APPLICATION HL ED NOV. 30. l9l8.

l 3 1 6, 3 27 Patented Sept. 16, 1919.

WITNESS:

'INVENTOR. @M/ y M 4 V BY THE cn nn; m ANnIwADH co., WASHINGTON, n. c.

bolt of the door. associated with a mortise lock must be re- OSCAR C. RIXSON, OF NEW ROCHELLE, NEW YORK.

Specification of Letters Patent. Patented Spfi. 16, 1919.

App1ication filed November 30, 191-3. Serial No. 264,832.

To all whom it may concern g Be it known that I, Oscar C. R xson, a citizen of the United States, residing at New Rochelle, in the county of Westche'ster and State of New York, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to looks and has special reference to that type of lock with which is commonly associated a key mechanism contained in a detachable casing.

usually cylindrical in form, and is ordinarily associated with a mortise look by passingit through a circular opening in one I of the side plates of the mortise lock and allowing it to extend through a corresponding circular opening in the structure of the 1 Fig, 5.

door so that the round head or face of the tumbler cylinder will be exposed upon the outside of the door to receive the key.

These pin tumbler looks or cylinders have ordinarily been provided with an external screw thread and the opening in the side of the mortise lock has been provided with a correspondingthread into which the tumbler look isscrewed, the tumbler lock being finally held in position by aset screw which passes through the face plate of the mortise lock and-enters a groove in the shell of the tumbler lock to prevent "it from being unscrewed from its seat. A defect in such construction resides in the fact that the set screw can be easily removed when the door is open, or by applying a wrench to the-exposed head of the tumbler lock and using a little force it can be twisted to cut of! the end of the set screw, whereupon, in either case, the tumbler lock can be unscrewed and removed from the door. With this cylinder lock removed from the mortise lock and the door, an opening is afiorded through which the finger, or a suitable instrument, can be inserted to throw the main A cylinder lock thus moved from its seat in the mortise lock before the latter can be either inserted in or removed from the. mortise because it vprojects laterally from the frame of the mortise lock and engages with the lateral opening in the stru'ctureof the door.

My invention is designed to afiord a vconstruction, whereby it becomes impossible to remove the pin tumbler look from the mortise look without first removing the mortise lock entlrely from the door and also renders it unnecessaryto remove the pin tumbler lock whenjeither applying the-lock to the door: or removing it therefrom. V

-In the accompanying drawings, wherein my invention is illustrated;

"F gure 1 is a section through that portio of a door containing the -mortise look, the.

7 section passing through the mortise lock and The key mechanism referred to usually 7 comprises a series of pintumblers'and a rotatable key-way plug carrying a cam, is

showing the pin tumbler lock seated therein; F g. 2 is a plan .of the pin tumbler lock; Fig. 3 1s a .central'transverse section of the p n tumbler locik;

, Fig. 6 is a section through the'center of The pin tumbler-lock consists of the cylinder 1 provided'with the usual eccentricallyarranged plug 2- in which the keyhole and passage .3 is formed, this plug being adapted torotate within a cylindrical seat in the main cylindrical framel 4 is a cam or crank armadapted to be rotated with the plu'gQ to actuate the bolt mechanism of themortise' look.

This cam is usually attached to the rear end" of the plug outside of the main cylinder, but

the present case it is carried at the middle 7 part ofthe plug. For this purpose the cam is-provided with a'ring 5 having two inwardly projecting lugs 6, 6, which enter two grooves, respectively, extending longitudinally of the plug, and to hold the cam in position upon the plug a lateral screw 6' is passed throughthe ring into the plug.

In order that the cylinder 1 may accommo-= date this cam at its mid location upon the plug, it is provided with a transverse slot 7, which extends across the entire diameter of the ,cylindrical'frame and is of a width to permit the easy swing of the cam there- .through. In order to hold the twoextremities ofthe cylindrical frame 1 together, notwithstanding this transverse slot,-the frame is provided with two lateral protuberances 8 and 9 which form rigid connections between the two ends of the cylinder.

The mortise lock comprises the usual rectangular casing formed by the side plates-10 and 1,1, the-face plate ,12 and the ,flange 13.

To a c mm dat th ztm le t face plates 10 and 11 are provided with concentric openings 14, 15, in which the extremities of the cylindrical frame 1 fit, the total length of the frame of the tumbler lock being such that its end faces will be substantially flush with the outer faces of the side plates 10 and 11. In order to hold the tumbler lock firmly in this seat, the mortise lock casing is provided with two parallel lugs 16 and 17 between which the protuberance 8 1s confined. 1V ith the cylinder lock thus associated with the mortise lock, it will be seen that the two locks cannot be separated without removing the mortise look from the door and then removing one of the side plates 10 or 11. The pin tumblers, indicated by 50,

are arranged in a row and for practical purposes a-re five in number, three being located on one side of the cam and two on the other. l/Vhen thus associated the length of the cylinder is necessarily limited to the thickness of the casing of the main lock and in order to mount the cam 4' at the end of the cylinder and provide for its swing within the casing of the main lock, the cylinder would have to To afiord access for the key to the pin tumbler lock, a circular opening 18 is provided in the structure of the door 18 axially with the key plug 2 of the tumbler look. This opening is to be covered by an escutcheon plate or disk 19 in the center of which is a circular orifice 20 in which is fitted to rotate a short cylindrical plug 21 having a keyhole 22 of the same pattern as the keyhole of the plug 2 and arranged in line with the latter so that when the key is passed through the plug 21, it will be accurately guided thereby into the keyhole 3 of the plug 2. When the escutcheon plate with its plug 21 is applied to the opening in the door,

the plate itself is secured to the head of the lock 1 by means of two screws 23 and 2 1-,

which pass into threaded holes 25 and 26,

respectively, in the lock. At the same time the shortguiding plug 21 is secured to the main key plug 2 by means of "pins 27, 28,

which pass through the short plug and into the end of the key plug. In this way the guiding plug 21 and the key plug are held in fixed relation to each other. By this means of attaching the escutcheon plate with its short plug 21 to the tumbler look, any

thickness of the door structure is compen 1 sated for by the screws and pins which may enter to a greater or lesser extent into the head of the main look.

It will be seen that any attempt to operate the lock without a key, by removing the escutcheon plate is defeated by the fact that access to the mechanisn'i of the mortise lock is barred by the presence of the cylinder lock, which as before stated, cannot be removed without removing the mortise look from the mortise.

I claim:

1. The combination of a mortise look, a second look mounted in the frame of the mortise lock and removable therewith from the mortise. and an escutcheon detachably connected with and s aced from the said second lock.

2. The combination with a lock provided with a rotary plug having a passage for a key of an escutcheon spaced therefrom and provided with a rotary member having a key passage and detachably connected with said plug.

3. The combination with a lock provided with a rotary plug having a passage for a. key of an escutcheon therefor provided with a rotary member having a key passage, the escutcheon and rotary member being respec tively detachably connected with the lock and plug. g

4. The combination of a mortise lock having openings in its casing, and a second look mounted in said casing and extending into said openings and having lateral lugs engaging the inner faces of the casing to prevent the removal of the second lockfrom the casing of the mortise lock.

5. A lock comprising a cylindrical body in two parts separated by a space in a transverse plane, lateral lugs bridging said space and connecting the parts together, a rotary key plug common to both parts, a cam carried by the plug and swinging in said space, and a series of radial tumblers intersected by said space.

6. The combination of a mortise lock having a casing provided with two concentric circular openings in its opposite side plates and with a pair of spaced'lugs adjacent said openings, and a cylindrical lock mounted in said casing with its extremities projecting 1 into said openings respectively and provided with a lug confined between the said two lugs in the casing to prevent the rotation and dismounting of the cylinder lock.

7. The combination with a mortise lock, of a second look located within the casing of the mortise lock and removable therewith from the mortise, said second look provided with a rotary plug having a passage for a key, and an escutcheon for said second look provided with a rotary member having a keyix passage and. spaced; from the second 8. The combination with a mortise lock, of a tumbler lock located within the casing of the mortise lock and removable therewith from the mortise, said tumbler lock comprising a cylindrical key plug having a passage for a fiat key, a single series of pin tumblers radially disposed with respect to the plug and arranged parallel to each other and in the same plane, and a flat key having a line of bitting on one edge only.

9. The combination with a mortise lock, of a tumbler lock located within the casing of the mortise lock and removable therewith from the mortise, said tumbler lock comprising a cylindrical key plug and a series of pin tumblers radially disposed with respect to the plug and arranged parallel to each other and in the same plane, and a roll-back carried by the plug and arranged in a plane intersecting the series of pin tumblers.

10. The combination with a mortise lock, of a tumbler lock bodily removable therefrom and having a cylindrical key plug and a single series of pin tumblers radially disposed with respect to the plug, arranged parallel to each other and in the same plane, said tumblers being located wholly within the frame of the mortise look when the tumbler lock is associated therewith.

In witness whereof, I subscribe my signature.

OSCAR C. RIXSON.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

